Calculations for a harmonic damper.
| Identifier | Morton\M9\ img005 | |
| Date | 28th August 1931 | |
| To E. {Mr Elliott - Chief Engineer} From Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} Hs {Lord Ernest Hives - Chair} /Gry. {Shadwell Grylls} 3/MJ. 28.8.31. ORIGINAL HARMONIC DAMPER. Herewith calculations done at Cambridge on spring driven damper. The value of M is the effective polar moment of inertia of the shaft, that is the sum of the inertia on the nose plus 1/3 of the distributed inertia. The calculations are for any applied frequency, the natural frequency of the crankshaft being - Hs {Lord Ernest Hives - Chair} /H. Grylls. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).